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D. HAZZ'ARD, 0F MILTON, DELAWARE.

VTLetters Patent No. 72,037, dated Decemer 10, 1867 IMPROVEMENT 1Nmarrow-scams;

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TO ALL WHOM IT MAY CONCERN:

-Be it known that VI, D.' HZZARD, 'of Milton, in. the county of Sussex,and' State of Delaware, have invented new and improvedPlatform-Scalest-and I doV hereby declare that the following is a full,clear, and exact descriptionv thereof, which will enable `those skilledin -the art to make and use the saine, reference being had to theaccompanying drawings, forming part of this speciicaton.

This invention relates to anew and improved inethod of constructingscales of the platform kind; and itL consists in attaching a spiralSpring to a spindle, to the top end of which spindle the platform issecured, and to the bottom end of which an indicating-rod and finger isattached, so that when an article to he weighed is placed on theplatform, the weight of the article will act upon the spring, and beindicated by the finger, as will he hereinafter described. l Y

Figure 1 represents a` vertical section ci'. the scale, through the line:z: ai of 5g. 2.

Figure2 is a horizontal section, through'the line y y of iig. 1. I

Figure 3 is a view ofthe top of the stand. I

Similar letters of reference indicatecorresponding parts.

A is a hollow stand, which is secured to a bed-plate marked B; C is thespindle, -D is the spiral spring, E is the platform. F represents aplate, which is secured to the stand to which the spring is attached,and through which the spindle C passes. The spindleis kept steady and inplace by four. frictionrolls b b b b, secured in the top ot" the-stand,as'seen in the drawing. G isan elastic rod, which is attached to thebottom end of the spindle, the lower end of whichzelastic rod is curved,and passes through the side of the stand, and forms a pointer orindicating-iinger, h,`on the plate H, a'top view of which plate is seenin iig. 2.V J is a tubular cavity within the standA, which contains thespring, and K is a cavity of larger diameter, into which the spindle andlower end of the spring extend in the process of weighing. Thislattertubular cavity is seen in section in iig. 2. The lower end of thespindleis attached to a plate, L, on which plate are secured, on pivots orarbors, frictionrolls e e e e', which serve to keep' the spindle in acentral position as'it is depressed in weighing.

. As the spring and rod are pressed down in the process of weighing, theelastic rod G, with the indicator 71, will slide in the slot in theplate H, indicating thereby the weight of the article on the platform,the plate H being properly graduated and figured for the purpose, asseen in the drawing. The elastic rod G is guided or kept in place byharsc c c,'wl1ich pass through the cavity K in the stand. The operationis so plainly shown in the drawing that further description is deemedunnecessary.

i Having thus described my invention, I claim-as new, and desire tosecure by Letters Patent- The hollow stand A, the spindle C, the springsD, the elastic rod G, and the graduated plate H, in combinationandarranged substantially as shown and described, for the purposes setforth.

' i D. HAZZARD.

Witnesses:

A. T. Screener,

WINE. Scorr MeILvAIN.

